Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
B25D9/14—Control devices for the reciprocating piston
B25D9/16—Valve arrangements therefor
B25D9/18—Valve arrangements therefor involving a piston-type slide valve
Steuerung für Zweicylinder-Verbunddampfmaschinen mit, durch Dampf oder besondere Steuerung bewegtem Expansionskolbenschieber im Grundschieber des Hochdruckcylinders und festem Expansionsschieber mit Hilfseinströmung für den Niederdruckcylinder